So, for a while now, I've always had my inbox message counter one higher than it actually is ... it's not a major thing, of course. I was just curious as to why or if it could be fixed. I think it happened around the time the folders became active, but I can't remember.

@Faded Memory saw this a few days ago and been wondering how any troubleshooting ways that may resolve it. What you could try is un-deletimg all your messages (an option inside your trash folder) and see what turns up. There could have been a message that didn't get moved over and somehow created a number issue.